.box {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 900px;
  border: 1px solid black;
  ul {
    width: 100%;
    overflow: hidden;
    li {
      float: left;
      width: 33.333%;
      img {
        width: 100%;
        display: block;
      }
    }
  }
  .cover {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 1;
    bottom: 0;
    right: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: none;
    align-items: center;
    justify-content: center;
    .big-img {
      width: 380px;
    }
    .close {
      position: absolute;
      top: 70px;
      left: 600px;
      background-color: red;
      color: #ffffff;
      width: 30px;
      height: 30px;
      border-radius: 5px;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      &:hover {
        background-color: rgb(150, 5, 5);
      }
    }
  }
}
